Middlesex County Information:
# Cities: 42
# ZIP Codes: 60
# Area Codes: 4
Area Codes: 508 617 781 978
Middlesex County is the 3rd largest of 14 Massachusetts counties.
Middlesex County is the most populous of 14 Massachusetts counties and 19th most populous county in the nation.
The average home costs $297,541.96 in Middlesex County with 2.50 people per household.
CBSA: Boston-Cambridge-Quincy, MA-NH (Metro)
FIPS: 25017
MSA: Boston-Worcester-Lawrence, MA-NH-ME-CT CMSA